1. Do not view the material properties in the editor before testing. If you do, the material will be cached in RAM until you restart the editor.
2. Hit play. Note that the material displays with random colors until the generation completes.
3. Stop and restart game. Note that the material displays with random colors until the generation completes again. It is expected that the material would load from cache instead of regenerating.
4. Note the console log showing that "isCachedDataAvailable is false" after generation completes.

Reproduced: 5.0.2p1, 5.0.0b22, 4.6.3f1